package com.tencent.common;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.URL;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;

import net.sf.json.JSONObject;


public class GetOpenId{
	
	public static WeiXinOauth2Token getOauth2AccessToken(String appId, String appSecret, String code) {
       
		WeiXinOauth2Token wat = new WeiXinOauth2Token();
        String requestUrl = Configure.GET_OPENID.replace("APPID", appId).replace("SECRET", appSecret).replace("CODE", code);
        System.out.println("requestUrl:" + requestUrl);
        String str = httpsRequest(requestUrl, "GET", null);
        System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>OAUTH2" + str);
        JSONObject jsonObject = null;
        if (null != str) {
        		jsonObject = JSONObject.fromObject(str);
                try {
                        wat = new WeiXinOauth2Token();
                        wat.setAccessToken(jsonObject.getString("access_token"));
                        wat.setExpiresIn(jsonObject.getInt("expires_in"));
                        wat.setRefeshToken(jsonObject.getString("refresh_token"));
                        wat.setOpenId(jsonObject.getString("openid"));
                        wat.setScope(jsonObject.getString("scope"));
                } catch (Exception e) {
                        wat = null;
//                        String errorCode = jsonObject.getString("errcode");
//                        String errorMsg = jsonObject.getString("errmsg");
                }

        }
        return wat;
	}
	
	/**
	 * 发送https请求
	 * @param requestUrl 请求地址
	 * @param requestMethod 请求方式（GET、POST）
	 * @param outputStr 提交的数据
	 * @return 返回微信服务器响应的信息
	 */
	public static String httpsRequest(String requestUrl, String requestMethod, String outputStr) {
		try {
			// 创建SSLContext对象，并使用我们指定的信任管理器初始化
			TrustManager[] tm = { new MyX509TrustManager() };
			SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
			sslContext.init(null, tm, new java.security.SecureRandom());
			// 从上述SSLContext对象中得到SSLSocketFactory对象
			SSLSocketFactory ssf = sslContext.getSocketFactory();
			URL url = new URL(requestUrl);
			HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
			conn.setSSLSocketFactory(ssf);
			conn.setDoOutput(true);
			conn.setDoInput(true);
			conn.setUseCaches(false);
			// 设置请求方式（GET/POST）
			conn.setRequestMethod(requestMethod);
			conn.setRequestProperty("content-type", "application/x-www-form-urlencoded"); 
			// 当outputStr不为null时向输出流写数据
			if (null != outputStr) {
				OutputStream outputStream = conn.getOutputStream();
				// 注意编码格式
				outputStream.write(outputStr.getBytes("UTF-8"));
				outputStream.close();
			}
			// 从输入流读取返回内容
			InputStream inputStream = conn.getInputStream();
			InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
			String str = null;
			StringBuffer buffer = new StringBuffer();
			while ((str = bufferedReader.readLine()) != null) {
				buffer.append(str);
			}
			// 释放资源
			bufferedReader.close();
			inputStreamReader.close();
			inputStream.close();
			inputStream = null;
			conn.disconnect();
			return buffer.toString();
		} catch (ConnectException ce) {
			ce.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

}